# MongoDB\Driver\Server::getLatency

(mongodb >=1.0.0)

MongoDB\Driver\Server::getLatency — Returns the latency of this server in milliseconds

### Beschreibung

final public MongoDB\Driver\Server::getLatency(): ?integer

Returns the latency of this server in milliseconds. This is the client's measured » round trip time of a `hello` command.

### Parameter-Liste

Diese Funktion besitzt keine Parameter.

### Rückgabewerte

Returns the latency of this server in milliseconds, or `null` if no latency has been measured (e.g. client is connected to a load balancer).

### Fehler/Exceptions

- Wirft eine MongoDB\Driver\Exception\InvalidArgumentException, wenn beim Analysieren von Argumenten ein Fehler auftritt.

### Changelog

Version | Beschreibung
--- | ---
PECL mongodb 1.11.0 | This method will return `null` if no latency has been measured. In earlier versions, an integer was always returned and an unset value might be reported as `-1`.

### Beispiele

Beispiel #1 MongoDB\Driver\Server::getLatency() example

`<?php
$manager = new MongoDB\Driver\Manager("mongodb://localhost:27017/");
$server = $manager->selectServer();
var_dump($server->getLatency());
?>`

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

    int(592)

### Siehe auch

- MongoDB\Driver\Server::getInfo() - Returns an array of information describing this server
- MongoDB\Driver\ServerDescription::getRoundTripTime() - Returns the server's round trip time in milliseconds
- » Server Discovery and Monitoring Specification

`↑` and `↓` to navigate • `Enter` to select • `Esc` to close • `/` to open